Datasheet

FLOW SWITCHES
63
FLOW
SWITCHES
www.gems-sensors.co.uk
FS-550E 15.0 - 125.0 (l/min) with pre-adjusted set points
PISTON TYPE
white
brown
green
24mm max from
inside of pipe to
underside of
hexagon
Housing: Brass or Stainless Steel
Paddle: Stainless
Spring: Stainless
Magnet: PTFE
26
36
17
88
34
22
6
135
58 x 64
PG7
PG11
Standard FS-550E switches sense liquid flow in either direction to monitor flow/no-
flow conditions. The paddle is trimmed during installation to permit switch actuation at
the desired flow rate. As flow increases in a pipe, the paddle of the switch pivots to
move out of the liquid path, producing less than 200mb of pressure drop regardless of
pipe size.
Max. flow determined by the pipe’s inside diameter
Max. operating pressure 55 bar
Proof pressure 82 bar
Max. pressure drop 0.2 bar
Temperature range cable: -20 °C...+80 °C
terminal box: -20 °C...+150 °C
Set points see set point adjustment guideline
Switching function
(related to increasing flow) -SPDT
Mounting orientation vertical, electrical connection up
Repeatability ±5%
Adjustment accuracy ±25%
Hysteresis max. 50%
Mounting R1"
Electrical connections - cable: PVC,3 x 0.34 mm2 (length: approx. 1 m)
- terminal box
Enclosure - IP 65
Electrical data contact rating - SPDT max. 20 VA, 0.5 A, 250 V~
Weight 0.6 kg
Specifications (all data related to water at +20°C)
How to Order
Set Point Adjustment (approximate)
Mounting Method Wiring Diagram
Electrical
Connection Brass Stainless Steel
Cable 020-3493 020-3495
Terminal box 020-3497 020-3499
Cut-off size Pipeline sizes
1 1/2" 2" 2 1/2" 3"
Set points (l/min) with increasing
and decreasing flow
1 1/2" 57 42 106 80 144 114
2" 84 57 103 76 182 144
2 1/2" 80 53 152 99
3" 118 76
incr. decr. incr. decr. incr. decr. incr. decr.
Dimensions (in mm)
Standard Products in bold